This is a Black Widow guitar made by Bartell and branded for Hohner.  According to Dave Peckels, when Bartell’s contract with Hohner ended they were informed that they still owed Hohner some guitars so this may be one of those guitars.  They may have simply rebranded one or more of the Acoustic Black Widows to fill out their obligation to Hohner.  The pots are dated 1969 which places it about the time Bartell was doing their Black Widow run for Acoustic.  The serial number is stamped into the end of the tailpiece and is similar to the serial of the # 91191 Bartell fretted bass.